One item that you might want to add to your toolkit is the Network Security Toolkit (NST), which is a project developed and maintained by Ron Henderson and Paul Blankenbaker. The NST is available as a bootable CD-Rom or an International Organization for Standardization (ISO) downloadable image. The tools included with NST are for the most part taken from a list of security tools that a group of security professionals voted as most popular. 
Based on the feedback, Fyodor published “The Top 75 Secruity Tools,” which you can find at http://www.insecure.org/tools.html. NST includes most of these tools.
When you reboot a system with the NST CD-Rom loaded, a trimmed-down version of Redhat Linux9 opens. After the OS is running, you can access the tools on the CD-Rom through the local console, through a serial connection, via the network from another system, or through a web browser.
Network Security Toolkit website
download the ISO images here